Verify jprobe's entry point is a function entry point
using kallsyms' offset value.
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
LKML-Reference: <
1284512670-2369-3-git-send-email-namhyung@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
if (num <= 0)
return -EINVAL;
for (i = 0; i < num; i++) {
if (num <= 0)
return -EINVAL;
for (i = 0; i < num; i++) {
+ unsigned long addr, offset;
jp = jps[i];
addr = arch_deref_entry_point(jp->entry);
jp = jps[i];
addr = arch_deref_entry_point(jp->entry);
- /* Todo: Verify probepoint is a function entry point */
- jp->kp.pre_handler = setjmp_pre_handler;
- jp->kp.break_handler = longjmp_break_handler;
- ret = register_kprobe(&jp->kp);
+ /* Verify probepoint is a function entry point */
+ if (kallsyms_lookup_size_offset(addr, NULL, &offset) &&
+ offset == 0) {
+ jp->kp.pre_handler = setjmp_pre_handler;
+ jp->kp.break_handler = longjmp_break_handler;
+ ret = register_kprobe(&jp->kp);
+ } else
+ ret = -EINVAL;
if (ret < 0) {
if (i > 0)
if (ret < 0) {
if (i > 0)